Oneway Vari-Grind Upgrade Clamp Kit is an enhanced hold-down designed specifically for Oneway’s Vari-Grind Attachment used with the Wolverine Sharpening System. This upgrade replaces the older rear spring mechanism, providing a more secure grip and increasing the jig’s holding capacity to accommodate tool diameters up to 3/4". I for woodturners seeking improved stability and precision during sharpening, this clamp kit ensures your tools are held firmly for consistent, accurate results. Model Number: 3916